Caliper



FIG. 1 is a front elevational view of a caliper showing my new design; the rear elevational view being substantially the same thereof;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a left end elevational view thereof; and

FIG. 5 is a right end elevational view thereof. 

The ornamental design for a caliper, as shown and described. 